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what is sub function?
what is the applications of sub function?
what is the procedure to implement it?
please provide different examples to understand this function?
This is for QlikView but is the same also for Sense: QlikView Tutorial | How to create Subroutines or functions in qlikview script | Data & Tools
Sub stands for subroutine. See post of @micheledenardi for some background.
Example:
Sub Example // begin statement name of subroutine is Example
Example:
LOAD * INLINE [Example_Key, Example_Dimension, Example_Measure
1, First Example, 1
2, Second Example, 2
];
End Sub // end statement of subroutine
If you would run the script like this then nothing will happens, because you didn't make the call for this subroutine.
If you want to run this code, you will have to use the Call function. Like this:
Sub Example
LOAD * INLINE [Payment ID,Payment Source,Payment Amount
1,Source 1,500
1,Source 1,400
1,Source 2,900
2,Source 1,100
2,Source 2,50
] (delimiter is ',')
;
End sub
Call Example
If you run this script then the table will be loaded.
Now, when to use this? With a subroutine you can make your own order of loads. Like:
Call Example
Call AnotherExample
This could be handy if you have to script and test if the code works or not. You could comment out one of the subroutines.
Another use case is that you have script that is of generic/general use and you have to use this piece of code all the time. So what you don't want to do, is copying this script over and over again.
Sub Store(vTablename)
STORE $(vTablename) into $(vTablename).qvd (qvd);
End Sub
This example shows a subroutine with a code for storing a table into a QVD file. Now if we want to store a table after loading the table we can call this subroutine and have the loadscript excecuted. Like this:
Sub Example
ExampleTable:
LOAD * INLINE [Payment ID,Payment Source,Payment Amount
1,Source 1,500
1,Source 1,400
1,Source 2,900
2,Source 1,100
2,Source 2,50
] (delimiter is ',')
;
Call Store('ExampleTable');
End sub
Call Example
There are some great subroutines available in this community for generic use. There is even a library (Qlikview components) here Qlikview Components .
Kind regards
Eddie
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